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Adam and Barbara are going with three friends to see a movie. Assume that the five...

Adam and Barbara are going with three friends to see a movie. Assume that the five friends are seated randomly in five consecutive seats.

In how many ways can  Adam and Barbara choose to sit in two of the five seats?

answer is either: 20,10, 15, or 25

Math   Statistics-And-Probability   
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TOPIC:Permutation and Combination.

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